Hi Peter
1.3. please look on AN4467 i.MX 6 Series DDR Calibration
https://www.nxp.com/docs/en/application-note/AN4467.pdf
2. for changing frequency examples one can look at linux cpufreq, bus drivers described in
Chapter 23 CPU Frequency Scaling (CPUFREQ) Driver, Chapter 24 Dynamic Bus Frequency Driver
attached Linux Manual. For boot with lower frequencies one can use BT_FREQ=1 option
described in Table 8-4. Normal frequency clocks configuration i.MX6DQ Reference Manual
https://www.nxp.com/docs/en/reference-manual/IMX6DQRM.pdf
Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
Hi igorpadykov
How can I change BT_FREQ=1 value ? Is that in U-boot DCD configuration files ? Could you please tell me the method ?
Regards,
Peter.
Hi Peter
please look at BT_FREQ (BOOT_CFG3[2]) description in
Table 8-2. Boot eFUSE descriptions, Table 8-3. GPIO override contact assignments
i.MX6DQ Reference Manual.
Best regards
igor